Triangles: Congruent, Isosceles, Equilateral

Which angle is the vertex angle?

• <C

• <A

• <B

• There is no vertex angle

Tags

CCSS.HSG.CO.C.10

If two sides of a triangle are congruent, then the _________________ opposite those sides are congruent.

• sides
• vertices
• angles
• measures

If an isosceles triangle has a base angle measuring 40°, then what measure is the vertex angle?

• 120°
• 100°
• 40°
• 80°

Find x

• 90

• 45

• 80

• 35

Find x

• 60
• 48
• 30
• 28

Solve for x.

• 7
• 9
• 10
• -11

Find the measure of the indicated angle. 

• 145
• 113
• 102
• 78

Tags

CCSS.8.G.A.5

Find the measure of ∠BDE

• 12^o

• 57°

• 78^o

• 45^o

Tags

CCSS.8.G.A.5

Find the measure of ∠CED

• 52^o

• 64°

• 76^o

• 128^o

Tags

CCSS.8.G.A.5

Find the value of x.

• 6

• 1

• 3

• 5